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Magnetics question

2019 · 10 Apr · Shift 1 · Q44
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Magnetics question

2019 · 10 Apr · Shift 1 · Q44

JEE MainPhysicsMagneticsMCQ+4 / −1
A proton, an electron, and a Helium nucleus, have the same energy. They are in circular orbits in a plane due to magnetic field perpendicualr to the plane. Let rp, re and rHe be their respective radii, then
  1. A
    re < rp < rHe
  2. B
    re < rp = rHe
  3. C
    re > rp > rHe
  4. D
    re > rp = rHe
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